Mechanistic Investigation into the Unique Orientation Textures of Poly(vinylidene fluoride) in Blends with Nylon 11

Abstract

Self‐seeded crystallization experiments were carried out to detect the mechanism of the unique orientation behavior of poly(vinylidene fluoride) (PVDF) in oriented PVDF/nylon 11 blends. It was found that primary nuclei have no effects on the final orientation textures adopted by PVDF. The results show that the PVDF crystal orientation in the oriented blends is determined in the early stage of crystal growth, thus a trans crystallization mechanism is preferred.Isothermal crystallization kinetics for the self‐seeded and non‐self‐seeded crystallization at 145 °C.magnified imageIsothermal crystallization kinetics for the self‐seeded and non‐self‐seeded crystallization at 145 °C.

Composite Poly(vinylidene fluoride)/Polystyrene Latex Particles for Confined Crystallization in 180 nm Nanospheres via Emulsifier-Free Batch Seeded Emulsion Polymerization

“…Finally, in addition to the size of confined space, we also note that the confinement environment can also play an important role in inducing polar phases for PVDF . If the confinement environment provides a polar substrate for molten PVDF to crystallize, such as KBr/NaCl, mica, organo-modified clays, − carbon nanotubes, or even immiscible polar polymers [nylon-11 − and polyacrylonitrile (PAN) , ], polar phases can be obtained for PVDF. However, if the confinement environment provides a nonpolar substrate for molten PVDF to crystallize (e.g., PSF and PS) and the size of confined space is large enough, the nonpolar α phase will be obtained .…”

Multiscale-structuring of polyvinylidene fluoride for energy harvesting: the impact of molecular-, micro- and macro-structure

“…123,124 When blending ferroelectric PA11 and PVDF, the glass transition temperature and melting point of PA11 decreases with increasing PVDF concentration, due to the dipolar intermolecular interactions between the polar amide groups (-NH-CO-) in PA11 and the polar -CF 2 groups in PVDF. 121,125 It has also been found that the hydrogen-bonded structure of PA11 becomes more disordered as the PVDF concentration is increased. The PVDF developed a larger proportion of polar band g-phase in blends with a high PA11 concentration compared to pure PVDF under similar melt quench conditions.…”

Uniaxial Drawing of Poly[(R)‐3‐hydroxybutyrate]/Cellulose Acetate Butyrate Blends and Their Orientation Behavior

“…Recently, a unique orthogonal orientation, where polymeric chains align perpendicular to the drawing direction, has been occasionally reported in heterogeneous systems such as block copolymers, immiscible blends and organic/inorganic composites. Several models involving the epitaxial crystallization,8–10 thermal shrinkage stress,11,12 confinement of crystal growth,13–21 and trans‐crystallization22,23 have been employed to interpret such a behavior. However, it has rarely occurred in homogenous systems.…”